from tkinter import *
root = Tk()
root.title("ИТ Марафон")
root.geometry('500x500')
canvas = Canvas(bg='white' , width=500 , height=500)
canvas.pack(anchor=CENTER, expand=4)
canvas.create_polygon(0,0,0,20,30,20,30,0,20,0,20,10,10,10,10,0,0,0)
